Joetsu Cable Vision reports potential personal information leak

Joetsu Cable Vision has reported a potential leak of personal information following unauthorized access to its helpdesk email address. On August 15, 2026, the company's monitoring system detected that the email address was being exploited to send large volumes of spam to external recipients.

Following emergency measures, including a password change, investigations revealed that four emails stored in the mailbox were accessed by a third party. While the specific contents of these emails have not yet been identified, the company is working to determine if they contained personal information such as names, addresses, or phone numbers. The potential impact involves customers who exchanged emails with the helpdesk between February 11, 2023, and August 15, 2026.

The company has reported the incident to authorities in accordance with personal information protection laws and is continuing its investigation to identify the exact scope of the breach.